Chainsaw Repair

SILVEY SDM-4 SQUARE GRINDER

I came across these pictures of a Silvey SDM-4 grinder. It is a variation of the Silvey Prosharp even though it has two chain vises like a RZ II. Relationship is more towards the Prosharp because of the way it presents the chain cutter to the grinding wheel so that the whole working surface of the grinding wheel does an equal amount of grinding. The way the vise holds the chain is more like the Prosharp and not at all like either of the Razur Sharp designs.

http://silveychaingrinder.com/chisel-square-grinders/sdm-4-grinder

http://www.madsens1.com/sil_sdm4.htm

http://www.madsens1.com/GRAPHICS/Silvey/sdm4.wmv